/* Copyright (C) 2003-2016 Patrick G. Durand
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.plealog.genericapp.api.file;

import java.util.Hashtable;

/**
 * This class manages file types. The easiest way to use this class consists in using method
 * registerFileTypes(String, String) to add a file type, then use getFileFilter(String) to
 * retrieve a instance of EZFileFilter.
 */
public abstract class EZFileTypes {
	/** list of valid file types */
	private static Hashtable<String, String> _acceptedFiles = new Hashtable<>();

	/**
	 * Registers a new file type.
	 *
	 * @param extension   file extension
	 * @param description file extension description
	 */
	public static void registerFileType(String extension, String description) {
		_acceptedFiles.put(extension, description);
	}

	/**
	 * Gets a file filter for the given extension file type.
	 *
	 * @param extension file extension to search for
	 * @return a EZFileFilter object or null if extension has not been registered to this manager.
	 */
	public static EZFileFilter getFileFilter(String extension) {
		EZFileFilter glff;

		if (!_acceptedFiles.containsKey(extension))
			return null;
		glff = new EZFileFilter(extension, _acceptedFiles.get(extension));

		return (glff);
	}

}
